Granted Patent
Utility
US 6,609,538 · App. 09/976,383
Auto-relieving pressure modulating valve
Inventor:
Stephen Royle
Patented Case
View Patent ↗
Granted: Aug 26, 2003
Filed: Oct 11, 2001
Inventor
Stephen Royle
Assignee (at issue)
MICO LTD.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.